How do you find someone to make complaint of USPS?

To file a complaint with USPS, you can start by visiting their official website and navigating to the "Contact Us" section, where you'll find options for submitting a complaint online. Alternatively, you can call their customer service at 1-800-ASK-USPS (1-800-275-8777) for assistance. If you prefer, you can also visit your local post office and ask to speak with a supervisor for help with your issue.